Oven



July 12, 1927.

OVEN

Filed May 22. 1924 =2 Sheets-Sheet 1 Patented July 12, 1927.

CLARENCE WILLIAM AIRD, or snanrronn, onranro. cenana' assienon ,rornEBRANTFOBD oven & RACK o0,- LIMITED, or isnanrronn, onran o, oanana, A

CORPORATION or ONTARIO.

oven.

Application filed m y 22, 1924. serial-no; 715,211.

My invention relates to ovens, andhas for its object, a novelarrangement of fiues for distributing heat uniformly to the bakingchambers, and, a novel arra ngement of 1 draught check forregulating'the oven tem- 'perature and controlling the fuel combus-'tion. u

In carrying out the invention a fire heated oven, which can be of anyusual or approved in construction, is provided with direct fiuesdiverging from the fire box for the passage of gases to the circulatingfi'ues and'with a.

compensating fiue --coupling the diverging fines interjacent the firebox'and the circulat- 1.3 -ing fines to maintain an even balance in thevolume of gases passing from the fire box through the direct fines tothe circulating fines. The oven is also provided with a draught check incommunication with the compensating fiue for controlling the fuelcombustion and the circulation of the gases through the direct andcompensating fiues.

For an understanding of the invention reference is to be had to thefollowing dein which:

Fig. 1 is a sectional plan view of the oven showing the fire box and thenovel arrangement of direct and compensating fiues and draught check,and

Fig. 2 is a fragmentary vertical elevation of the construction shown inFig. 1.

Like characters of reference refer parts throughout the specificationand drawm s. lWhile the improvements 1 hereinafter described can be usedin connection-with any type of a fire heated oven they are particularlydirected tothat type of oven com prising a plurality of baking chambers,located one above the other. with horizontal fiuesbetween the bakingchambers, and a fire box and direct fiues, beneath the oven bottom,communicating withthe horizontal fiues'between the baking chambers. V

The oven shown in the drawings comprises an enclosing wall 1 withinwhich are baking chambers 2 and 3. Between the baking chambers arehorizontal fiues 4 connected at their forward ends with vertical flues5. Beneath the oven bottom is a fire box 7, which" in the constructionshown is located at the rear part of the oven and is provided withdirect fines S and 9 diverging towards the oven sides and front. Thefront ends scription and to the accompanying drawings to like of thefines 8 and 9 discharge into the vertic'al fines 5 and throughtheffiues5' into the horizontalfiues l;

' The vertical, and, the horizontal fines form part of the circulatingfiue system and when thesuctlon is uniform through both direct fiues;all parts of the oven are uniformly heated. lf-the' suction through thedirect fiues is uneven one side ofthe oven'is apt to beheated to ahigher temperature than the other side andto compensatefor the uneven'suction and maintain a uniform distributitur ofheat at both sidesof theoven bottom the direct fiues are coupled by a com pensatmgfiuecon'slsting of two converging arms 10. andll connected' witli thedirect fines Band 9' interjacentthe fire b '11 :and the vertical flues'5.

Assuming that the suction'through the fine .8 is greater than throughthe flue 9, then that part of the oven-above the fiue 8 will be heatedtoa higher temperature than that part ofthe oven above the flue 9. Withthecompensating fiue, consisting of the converging arms lO'and 11, couplingthe direct fiues 8 and 9, the suction through the fine 8 will createanequal'suction through the flue '9 audit part of the products ofcombustion from the fire box to the converging arm 11,

arm 1.0 and fiue 8 while the remainder'of the products of combustion inthe flue 9 will-pass I i to the corresponding vertical flue 5. The

suction thus created through the fiuei9 will be equal to thesuctionthrough the'fiue8 and both sides of the oven as a consequence;

will be uniformlyheated. Once the suction through the flue 9 is properlyestablished the passage of the products of combustion throughthe twofiues'will beevenly main tamed wlth a corresponding maintenance of eventemperature through all partsof the oven. The com. ensatin fiue not onlestablishes and maintains a uniform suction through the direct fines 8and 9 but it also; operates to heat that part of the oven, lying betweenthe direct fiues, to the same tempera ture as the sides of the oven areheated,

Through the" agency of the fire box, the diverging fines, and thecompensating fine,-

the heated products of combustion are so distributed as to maintain auniform temperature across the entire area of the oven bottom and heatall parts'of it evenly.

7 To control the temperature of the oven and Cll - What I claim as newand desire to secure by flue at the angle'la of convergence so that it\villcontrol both converging arms and 11 andflues 8 and 9.

I have constructed several ovens With this arrangement'of fines anddraught check and have been able to accurately control the temperatureof the baking chambers to the desired degree and I have also been ableto maintain the fires for a considerable period of time Withoutreplenishing the fuel sup- Having thus fully described my inventionLetters Patent is:

1. An even comprising an oven bottom, a fire box, and direct andcompensating fines beneath the oven bottom, the direct flues diverging,from the fire box, to circulating fines in communication With the endsof the diverging fines remote from the fire box, the compensating flueconsisting of tWo converging arms connecting the diverging flutesinterjacent the fire box and the communicating fine, and a draught checkcommunicating'with the compensating flue.

fines in communication with the ends of the diverging fines remote fromthe fire box, the compensating flueconsisting of tWo converging armsconnecting the diverging fines in- .terjacent the fire box and thecommunicating fine, and a draught check communicating r 40 With thecompensating flue at the angle of convergence of, its tWo arms.

3. An oven comprising an oven bottom, a fire box beneath the ovenbottom, vertical fines at the opposite end of the oven to the fire box,two horizontal flues beneath the oven bottom diverging from the fire boxto the'vertic'al fiues, and a flue consisting of two converging armsconnecting the horizontal flues interjacent the fire box and thevertical fines for creating a suction from one of the horizontal finesto the other and maintaining an even distribution of heat at the ovenbottom.

Dated at the city of Toronto, in the county CLARENCE W. AIRD.

both sides of

